1891 Census - surnames beginning with I
| Last Name | First Name | Age | Parish | Piece | Folio | Page |
| IBBOTSON | Denis | 69 | Douglas | 4689 | 97 | 90 |
| IBBOTSON | Eleanor | 62 | Douglas | 4689 | 97 | 90 |
| IDDON | Hugh | 40 | Vessels | 4692 | 112 | 112 |
| ILLINGWORTH | Helen L | 28 | Douglas | 4688 | 84 | 52 |
| ILLINGWORTH | Lavina | 29 | Douglas | 4689 | 6 | 56 |
| INCE | Ellen | 2 | Malew | 4690 | 128 | 16 |
| INCE | Elizabeth | 36 | Malew | 4690 | 128 | 16 |
| INCE | Elizabeth | 4 | Malew | 4690 | 128 | 16 |
| INCE | Henry | 5 | Malew | 4690 | 128 | 16 |
| INCE | Mary J | 8 | Malew | 4690 | 128 | 16 |
| INCE | William | 34 | Malew | 4690 | 128 | 16 |
| INCE | William E | 7 | Malew | 4690 | 128 | 16 |
| INGHAM | Christopher | 39 | Douglas | 4689 | 100 | 132 |
| INGHAM | Elizabeth Ann | 11 | Douglas | 4689 | 100 | 132 |
| INGHAM | Esther Ann | 13 | Douglas | 4689 | 100 | 132 |
| INGHAM | Mary Ann | 34 | Douglas | 4689 | 100 | 132 |
| INGLIS | David | 40 | Douglas | 4689 | 62 | 63 |
| INGLIS | Isobel M H | 3 | Douglas | 4689 | 62 | 63 |
| INGLIS | Jane | 42 | Douglas | 4689 | 62 | 63 |
| INGLIS | Janet E | 23 | Maughold | 4684 | 159 | 24 |
| INGLIS | Mary | 60 | Douglas | 4688 | 29 | 96 |
| INGRAM | Emily | 42 | Onchan | 4686 | 116 | 139 |
| INGRAM | Frances A | 28 | Douglas | 4688 | 122 | 5 |
| INGRAM | George | 20 | Douglas | 4687 | 11 | 102 |
| INGRAM | Joseph | 44 | Onchan | 4686 | 116 | 139 |
| INNES | Richard | 50 | Vessels | 4692 | 114 | 114 |
| INNES | William | 40 | Vessels | 4692 | 114 | 114 |
| IRELAND | Godfrey J | 4 | Lonan | 4686 | 31 | 194 |
| IRELAND | Gordon D | 6 | Lonan | 4686 | 31 | 194 |
| IRELAND | Margaret | 41 | Lonan | 4686 | 31 | 194 |
| IRELAND | Margaret E | 19 | Lonan | 4686 | 31 | 194 |
| IRELAND | Martha J | 14 | Lonan | 4686 | 31 | 194 |
| IRELAND | Robert F | 12 | Lonan | 4686 | 31 | 194 |
| IRELAND | Sarah | 15 | Onchan | 4686 | 114 | 95 |
| IRELAND | William J | 66 | Lonan | 4686 | 31 | 194 |
| IRELAND | William K | 17 | Lonan | 4686 | 31 | 194 |
| IRVINES | Jane | 21 | Douglas | 4688 | 137 | 160 |
| IRVING | Alice | 30 | Peel | 4683 | 24 | 224 |
| IRVING | Ann | 67 | Lonan | 4686 | 59 | 56 |
| IRVING | Annette Maud | 21 | Douglas | 4689 | 29 | 98 |
| IRVING | Clara Helena | 15 | Douglas | 4689 | 30 | 98 |
| IRVING | David | 4 | Braddan | 4690 | 23 | 79 |
| IRVING | Edith Annie | 23 | Douglas | 4689 | 29 | 98 |
| IRVING | Nellie | 2 | Peel | 4683 | 24 | 224 |
| IRVING | Bessie | 7 | Peel | 4683 | 24 | 224 |
| IRVING | Elsie J | 6 wks | Lezayre | 4684 | 144 | 53 |
| IRVING | Esther E | 35 | Lezayre | 4684 | 144 | 53 |
| IRVING | Florence Emma | 18 | Douglas | 4689 | 29 | 98 |
| IRVING | Frederick Robert | 13 | Douglas | 4689 | 30 | 98 |
| IRVING | James | 40 | Lezayre | 4684 | 144 | 53 |
| IRVING | Joseph | 37 | Peel | 4683 | 24 | 224 |
| IRVING | Mary A | 56 | Douglas | 4688 | 117 | 131 |
| IRVING | Milly | 5 | Peel | 4683 | 24 | 224 |
| IRVING | Raymond J | 2 | Lezayre | 4684 | 144 | 53 |
| IRVING | Robert | 53 | Douglas | 4689 | 29 | 98 |
| IRVING | Susannah | 4 | Lezayre | 4684 | 144 | 53 |
| IRVING | Thomas | 2 mos | Peel | 4683 | 24 | 224 |
| IRVING | Willie | 3 | Peel | 4683 | 24 | 224 |
| IRWIN | Ernest | 16 | Douglas | 4689 | 115 | 98 |
| ISAACS | Eliza | 52 | Peel | 4683 | 29 | 301 |
| ISAACS | Emma | 25 | Peel | 4683 | 29 | 301 |
| ISDALE | Sarah | 58 | Onchan | 4686 | 101 | 98 |
| ISDALE | Sarah Ann | 27 | Onchan | 4686 | 101 | 98 |
| ISDALE | William | 56 | Onchan | 4686 | 101 | 98 |
| ISDIKE | Christian | 40 | Santon | 4690 | 65 | 1 |
| ISHERWOOD | E B (f) | 42 | Ramsey | 4685 | 36 | 124 |